legislation to help states force online retailers to collect tens of billions of dollars insalestax. afinal senate vote could come by the end of the week. a campaign to raise funds to cover medical expenses for boston bombing victims and now double amputee jeff baumann has received an overwhelming response. nearly $620,000 has been raised in just six days. >>> finally, it's one thing to knowingly throw your money away in vegas, but get this. a recent audit found taxicab drivers overcharging tourists by taking them on the scenic route to and from the airport to the tune of $15 million last year. i may have been on one of those. >>> straight ahead, meet the members of the s.w.a.t. team that desended on the 19-year-old bombing suspect while he lay in that boat not knowing if he was armed or if the boat was boony trapped next. >>> the officers who arrested accused terrorist dzhokhar tsarnaev say the whole ordeal has not sunk in yet. the manhunt for tsarnaev culminated in a showdown in the backyard of a watertown home where he was hiding in a covered boat. with the help of powerful infrared surv